can't see video
While hormones can always be a factor.
Its also easy to have sudden fear of hands, or broken trust even if you aren't aware of the cause.
I've found going and saying hi, offering a treat by hand. And doing this many times a day. Can start bribing your way back into their heart.
And paying very close attention to body language, avoid bites, don't pressure or force interactions. Rebuild thst trust. Spending extra time with them.
If you need to video your interactions and go back abd watch for any missed que. Id say 99% of tge time they are giving them.
Click this link to take you to parrot behavior page
Yes I read that as well about urine. Absolutely, please share the you tube, or any articles you want. I'm fascinated by our birds friends! link to a Youtube video on UV Parakeet information.